Adjustable and safety regulating device for hypodermic needles



G. GASCHKE. ADJUSTABLE AND SAFETY REGULATING DEVICE FOR HYPODEBMICNEEDLES.

APPLICATION FILED AUG. 10. 1921.

1,436,707. Patented Nov. 28, 1922.

22 /6 N /.5 /7/PJ $23 \/Z Patented Nov. i922,

GEORGE GASOHKE, OE NEVIARK, NEW JERSEY, ASSIGNOR 'I'O AMERICAN PLATINUhIWORKS, OF NEW'ABK, NEVJ JERSEY, A CORPORATION OF NEXV JERSEY.

ADJUSTABLE AND SAFETY EEGULATING DEVTCE EOE HYPOIDERMIC NEEDLES.

Application filed August 10, 1921.

T 0 all whom itlmazy concern.

Be it known that I, Gnonen GAsoHKn, a citizen of the United States,residing at Newark, in the county of Essex andState of New Jersey, haveinvented new and useful Improvements in Adjustable and Safety RegulatingDevices for Hypodermic Needles, of which the following is aspecification.

The principal object of this invention is to provide an adjustablelimiting stop for hypodermic needles as used in injecting liquid.medicaments into the tissues of the body by dentists, physicians andsurgeons,

in producing local anesthesia and like purposes.

Another object is to provide means for withdrawing the needle should itbecome broken or separated from its holder.

A further object is to produce such limit ing devices in a form which isreadily engageable from needles as commonly constructed without changein the same.

Needles of the class mentioned are in reality hollow steel tubes havinga sharply bevelled entrance end and held in a holder comprising a shankformed at the end of a syringe barrel having a piston adapted for manualoperation, the entire instrument being grasped in the hand.

In operating such needles it is desirable to predetermine the depth ofthe insertion and prevent over intrusions; also due to the tragility ofthe needle structure, it is not unusual to have the needle break,generally at a point close to the holder, such breakage being caused byinadvertent movement, either of the patient or operator, frequentlynecessitating a surgical operation for its removal.

To overcome these defects is thus another object, which, together withthe others, is attained by the novel. construction and operation of thedevice hereinafter described and illustrated by the annexed drawing,forming an essential part of this disclosure, and in which Figure 1. isa side elevational. view indieating a conventional type of hypodermicneedle in operation and showing the application of the invention.

Figure 2 an enlarged side elevational view of the needle, the devicebeing shown in section.

Figure 3 is a greatly ei'ilarged perspective view of the regulatingdevice in detail.

Serial No. 491,081.

plan view of the blank beto present a sharp piercing point to enter' theflesh, and is firmly held at its opposite end in a holder 16 of anycommon type.

The gauging stop is formed from thin resilient sheet metal, one of itsends 17 being disc shaped and blended into a neck 18 of parallel width,leading to an enlarged oval shaped head 19.

When in the flat blank form as shown in Fig. 4:, a perforation 20 ismade in the cen ter of the disc 17 and a similar but slightly largerperforation 21 is formed through the head 19.

The blank is then bent to produce a curve 22 at about the juncture ofthe neck 18 and the neck disposed at an angle to the disc in such.manner as to bring the perforations 20 and 21 substantially intoalignment, the head 19 being so curved as to present its tip portion 23into position to slightly overhang the edge of the perforation 21.

The opening 20 is adapted to neatly fit the exterior of the needle 12and due to the bending of the head and neck elements the opening 21becomes slightly flattened so as to tightly receive the needle body andthe tip 23 is pressed tightly against it.

Thus due to the shape of the finished guard or stop it will, whenentered over the body of the needle, interpose a firm resist ance tomoving by pressure applied to the disc portion, but may be readilyadjusted by manipulating its curved end, thus afford ing a simple buteflicient adjustable stop.

it is also to be remarked that the head 19 presents a flat surface thatcan conveniently be engaged by pliers in removing the needle should. abreak occur, thus affording a safety device of practical merit.

As changes of construction could be made within the scope of theinvention, it is intended that all matter contained in the foregoingdescription or shown in the aceom panying drawing shall be interpretedas illustrative and not in a limiting sense.

Having thus described my invention,

what I claim as new and desire to secure by Letters Patent, is

1. A stop guard for needles comprising a Hat disc, a head substantiallyat a right angle to said disc and an angularly disposed neck extendingbetween said disc and head, said disc and neck having perforationssuited to engage the body of the needle.

2. A stop guard for needles comprising a flat disc, having a centralperforation fitting the needle, an obliquely disposed neck extendingfrom the periphery of said disc, said neck having an opening suited toengage the needle, a head at the opposite end of said neck and a curvedtip on said head, said tip being normally in spring contact with theneedle.

3. A stop guard for needles comprising a fiat perforate disc disposedtransversely on the needle body, an attenuated spring neck bent at anangle from said disc and aper tured to permit the passage of the needlebody, a flat head extending from said neck adjacent the needle, and aninwardly curved tip at the extremity of said head impinging against theneedle body.

4. A stop guard for needles comprising a sheet metal spring elementshaped and perforated to engage a needle at three distinct points, saidelement being adjustable along the needle by pressure applied at one endand adapted to resist pressure applied at its opposite end.

This specification signed and witnessed this first day of August, 1921.

GEORGE GASGHKE.

Witnesses FREDK. C. Frsorrnn, F. NoLL.

